Are there any potentially successful pharmacologic interventions (instead of CBT or behavioral interventions alone) for Schizoid personality disorder?  

This is a tricky question to answer in part because people with schizoid personality disorder do not typically present for treatment. If they do, it is often due to co-morbid symptoms such as mood or anxiety symptoms. Therefore, these symptoms are often what are targeted pharmacologically. People wi...

Psychodynamic psychotherapy is well suited to character disorders

I read recently that Guanfacine (Intuniv) has shown some promise with people with schizoid/schizotypal personalities.Alamo et al., PMID 27254403

I would give a try to Lamictal, low-dose, few side effects, and can secure some mood stability.